Jar-top-fastening device



May 8, 1923.

Filed June 7 Patented May 8, 1923.

manor-FASTENING DEVICE.

Application filed June 7,

To all whom it may concern:

Be it known that 1, JAMES M. Cruise, a citizen of the United States ofAmerica, residing at lVaco, in the county of McLennan and State ofTexas, have invented new and useful Improvements in Jar-Top-FasteningDevices, of which the following is a specification.

The object of the invention is to provide simple and efficient means forsecuring a jar top in place upon a jar without resorting to the screwcouplings and like devices ordinarily employed in this connection andopen to the objection of requiring a special construction of jar and theuse of sealing means which frequently permit of leakage or of the accessof air and which are in many instances affected by changes oftemperature or climatic conditions; and it is the further object of thisinvention to provide a jar top fastener which is particularly adaptedfor use in connection with jars for containing preserves or articleswhich require the effective exclusion of air under widely varyinconditions of temperature, and with these objects in view, the inventionconsists in the construction and combination of parts, of which apreferred embodiment is shown in the, accompanying drawings, whereinFigure 1, is a perspective view of the fastener applied in operativerelation to a jar as indicated in the dotted lines.

Figure 2, is a side view of the upper portion of the fastener showingthe adjacent portion of the ar and the jar top in section. The fastenerconsists essentially of a base loop 10 which may, as shown he formed ofa light cross sectionally fiat bar having reduced terminals 11 securedin any effective manner to the extremities of a cross head 12 havingdownturned terminals 13 fitted with eyes 14, 'said cross head beingcentrally formed with an eye 15 for the reception of a thumb screw 16,to thelower or inner end of which is applied a follower plate 17 havingbearing contact with the jar top 18. The jar top may consist of a smallflat disk 1920. Serial No. 387,260.

as indicated in Figure 2, seated upon the upper edge of the jarindicated at 19 with a suitable interposed washer or gasket 20 andobviously by means of the thumb screw any desired pressure may beapplied to the jar top to cause such a tension in the base loop whichextendsvbeneath the bottom of the jar as to position them in such amanner as to compensate for any variation in temperature and hence theexpansion and contraction of the loop without incurring the liability ofbreakage or permitting looseness. Obviously in addition to theyieldability of the loop, there is a certain elasticity in the arms ofthe cross head which will serve to compensate for changes in temperatureand the pressure as applied to the jar is-such as to not involve therisk of fracturing the latter. Moreover the depending extremities of thecross head insure the proper relation betweenthe same and the jar coveror top and minimize the tendency of the cross head to tilt or becomedisplaced laterally, the terminal eyes of said cross head being arrangedsubstantially in'the plane of the jar top. Thus any tendency of the carto tilt, as is likely in such devices, is offset by additional tensilestrain on the loop, since tilting of the same must result in raising theeyes 14 of the cross head. i

The invention having been described, what is claimed as new and usefulis As an article of manufacture, a jar top fastening device consistingof a cross head carrying a follower plate and a flexible loop to extendbeneath the jar and bear upon the bottom thereof, the cross head havingdepending arms to which the extremities of the loop are looselyconnected and serving under the tension of the loop, due to theadjustment of the follower screws, to maintain the cross head inoperative position on the jar top or cover.

In testimony whereof he afiixes his signature.

JAMES M. GRUSE.

